Leonard atwood



(-No Model.)

L. ATWOOD.

SAFETY HOD ELEVATOR.

Patented Feb. 6, 1883.

Uwrrep STATES PATENT OFFICE.

LEONARD ATWOOD, OF NEW YORK, N. Y.

SAFETY HOD-ELEVATOR.

SPECIFICATION forming part of Letters Patent No. 271,678, dated February6, 1883. Application filed July 25, 1882. (No model.)

To all whom it may concern:

Be it known that I, LEONARD ATWOOD, a citizen of the United States, anda resident of the city ofNew York, in the county and State of New York,have invented-certain new and useful Improvements in SafetyHod-Elevators and the Method of Hod-Elevating, of which the following isa specification, reference being bad to the accompanying drawings. a

The chief object of my invention is to adapt the endlesstraveling-ladder bod-elevator now known in the art to exigencies ofmodern buildlug.

It is now usual not only to build very high buildings, but also to makeunderneath very deep excavations for basements, cellars, andsub-cellars. On the very bottom of this excavation it is customary tomix the mortar, and a hod -elevaling apparatus must reach this point tocarry up hods filled with mortar and return emptied hods to be refilledand again elevated. It is also customary to deposit bricks on the streetabove, and on this level hods are therewith filled,carried to theascending elevator, and attached to be hoisted to their destination atthe top. Empty brickhods are taken off the descending ladder at thispoint to be refilled. Hitherto such a hodelevator has always been drivenfrom the top or bottom; but cannot practically or conveniently be sodriven by horse or steam power, owingto the difficulty of reaching suchpositions. The same objections apply, but not with equal force, to theuse ofhand-powerin the same positions. To overcome these fundamentalobjections I have invented the apparatus and system hereinafterdescribed, and illustrated in the drawings hereto attached, whereinsimilar letters of reference indicate corresponding parts throughout theseveral views.

Figure 1 is a side, and Fig. 2 a front, elevation of my apparatus; andFig. 3 is a plan of the motive-gearing on a median line.

The shafts A and B carry companion pulleys D D and E E, and arejourualed in ordinary frames well known in the art. These frame-worksare located respectively at the top and bottom of the hoistway, and theendless ladder travels around these pulleys.

Any well-known means of connecting the chains or ropes L L and affordingplaces of attachment for the hods, may be employed. Between theextremities of such a bod-elevator, and preferably upon the beams on alevel with the street, I place the motive-gearing and its frame-work. Asshown, it consists of a base, K, sustaining uprightsJ J, which hold injournals the shafts G and I.

The pinion H upon the shaft I communicates hand, horse, or steam powerapplied to it in any ordinary manner through the spur-wheel G to theshaft 0- This shaft 0 carries toothed or friction wheels F F, whichtransmit its motion to the chains or ropes L L, whereby the endlessladder is revolved.

In order to keep the chains or ropes L L against the driving-wheels F F,I provide suitable shoes or guides, M M. These may he held in properpositions by arms or braces-such as 0 ()-affixed to the frame-work,where most serviceable and least in the way, according to the judgmentof the mechanic, who may also give such shape and construction to theshoes or guides as to best adapt them to their pur pose. I preferangle-iron bent outward at the ends to prevent catching against thepassing links. The surfaces in sliding contact may be lubricated;

In addition to the novel and useful results of my invention alreadypointed out, the driving machinery is kept much cleaner and consequentlywears longer than in the old system,

and power in reference to the work to be done is more advantageouslyapplied.

What I claim as novel, useful, and my invention is 1. A shoe or guideconstructed and located to keep the driving-gearing and endlesstraveling belt ofa bod-elevator in contact, substantially as described.

2. The pairs of such shoes orguides located on opposite sides of thedriving-wheels, in the manner and for the purpose substantially asdescribed.

3. Amethod of elevating hods continuously, wherein the driving machineryis located between the terminations of the endless traveling belt, inthe manner and for the purpose substantially as described.

4. An endless bod-elevator adapted to ex- 7. As niotivegearing for andbetween the terminations of an endless bod-elevator, driving-wheelsadapted to engage and actuate the chains or ropes, in combination withshoes or guides, whereby such engagement is maintained, substantially asdescribed.

LEONARD ATWOOD.

Witnesses:

SIMEON FORD, JACOB Rn'r'rre.

